Product Description
The HELI-COIL MS21209F0820L is a military-standard screw-locking tanged wire thread insert engineered to form high-strength, vibration-resistant internal threads in soft metal base materials. Precision-wound from corrosion-resistant 302/304 stainless steel, this #8-36 UNF thread insert features a 2.0D nominal length with a cadmium plated finish, incorporating an exclusive locking coil configuration that grips the mating fastener to prevent accidental loosening under severe shock, vibration, or thermal stress.
Screw-Locking Mechanism utilizes a resilient series of chords on the center coils that apply radial pressure to the mating screw, preventing vibration-induced loosening.
Mil-Spec Compliance meets stringent MS21209 military specifications to guarantee precise manufacturing tolerances and maximum reliability in critical aerospace and defense systems.
Cadmium Plated Finish provides superior corrosion protection and excellent lubrication characteristics to reduce friction during assembly.
302/304 Stainless Steel delivers outstanding durability, high tensile strength, and heat resistance across challenging operating environments.
Precision Tanged Structure features a built-in drive tang to ensure efficient, repeatable installation using standard tanged insertion tooling.
NASM - Products meet Military Specifications (MS) and National Aerospace Standards (NAS) requirements as applicable and are shipped with appropriate documentation.
Product Specs
- SKU:
- MS21209F0820L
- Thread Size (Inch):
- #8-36 (0.164 Inch)
- Thread:
- UNF (Unified Fine Thread)
- Overall Insert Length (Decimal Inch):
- 0.328
- Tang:
- Tanged
- Material:
- 302/304 Stainless Steel
- Number of Free Coils:
- 9.75
- Length to Diameter Ratio:
- 2.0D
- Coating/Finish:
- Cadmium Plated
